完全垄断企业为了实现利润最大化，应遵循的决策原则是（）。 A.按照价格弹性进行价格歧

碳元素有金刚石、石墨和无定形碳等多种单质，下列关于碳单质的叙述正确的是[ ]

A.都是黑色固体

B.碳原子的排列方式都相同

C.在氧气中充分燃烧时都能生成二氧化碳

D.都能使红墨水褪色

The summer of 2012 was full of reports of extreme weather: one of the warmest years on record in the US, the wettest summer in the UK, and the worst drought (旱灾) in East Africa. In short, extreme weather seems to be becoming the new normal. Weather extremes are not that extreme any more. Heatwaves, droughts and wildfires are the new reality of a warming world.

And this should not come as a surprise. Scientists have been warning for years that as the planet heats up, we will have to deal with more dreadful weather. Although not every extreme weather event is the result of climate change, scientists are now much more confident about connecting weather events with climate change. In 2011, the UK had a warm November. Researchers say that it was at least 60 times more likely to happen because of climate change than because of natural changes in the earth’s weather systems.

All the news shows that climate breakdown is occurring faster than most climate scientists had expected. But isn’t it too expensive to stop the climate from changing? Well, yes it costs. So everything is just as usual. It would be wrong to believe that to let things continue as they always do is the cheap choice. Instead, it is very expensive. Just one example: droughts in the US, Russia and the Ukraine sent food prices to a record high. According to the World Bank, the price for corn increased by 113% in some markets in Mozambique and in Sudan. This is the kind of cost that often gets ignored.

I believe intelligent climate action can help create new opportunities for jobs in Europe, for encouraging creativity and competitiveness, for spending less money on energy.

小题1:According to the passage, in 2012 _____.

A．the UK had a warm November

B．the US had many wildfires

C．the UK had a dry summer

D．East Africa had little rain小题2:The author mentions the increase of food prices in Paragraph 3 to _____.

A．show a lot of people are hungry

B．prove food prices are very changeable

C．prove we’re paying for extreme weather

D．show it’s expensive to stop the climate from changing小题3:Which of the following statements does the author probably agree with?

A．Proper climate action will be useful.

B．Europe is providing limited job opportunities.

C．It’s everyone’s duty to protect the environment.

D．Everyone needs time to get used to extreme weather.

血友病患者必须拔牙时，首要的处理原则是( )

A．拔牙创内填塞止血材料

B．注射止血药

C．麻药中加肾上腺素

D．操作轻柔，减少创伤，缝合拔牙创

E．术前、术后多次输新鲜血

在汛期，水库、闸坝和其他水工程设施的运用，必须服从（）调度指挥和监督。

下列中哪一个不属于国际储备体系（）。

A、资本储备

B、黄金储备

C、外汇储备

D、特别提款权